CN208460913U - A kind of passive balancing control circuit of battery management system - Google Patents
A kind of passive balancing control circuit of battery management system Download PDFInfo
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- CN208460913U CN208460913U CN201821376878.5U CN201821376878U CN208460913U CN 208460913 U CN208460913 U CN 208460913U CN 201821376878 U CN201821376878 U CN 201821376878U CN 208460913 U CN208460913 U CN 208460913U
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- flyback transformer
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- way flyback
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model discloses a kind of passive balancing control circuits of battery management system, including the first two-way flyback transformer, second two-way flyback transformer and the two-way flyback transformer of third, the first two-way flyback transformer, the input positive terminal of second two-way flyback transformer and the two-way flyback transformer of third is connected in series, the input terminal of the first two-way flyback transformer is connected with the first enhanced MOSFET, the first freewheeling diode is serially connected between the source electrode and drain electrode of the first enhanced MOSFET, the output end of the first two-way flyback transformer is connected with the second enhanced MOSFET, the second freewheeling diode is serially connected between the source electrode and drain electrode of the second enhanced MOSFET, circuit uses hybrid equalizer circuit topological structure, farthest reduce Loss of the single equilibrium to metal-oxide-semiconductor and balanced component, has further reduced the difference between battery, has annexed and has damaged the balanced function with non-dissipative equalizing.
Description
Technical field
The utility model relates to battery management system application field, the passive balanced control of specially a kind of battery management system
Circuit processed.
Background technique
Increasingly deficient in traditional fossil energy, environmental crisis further serious today, countries in the world and area are increasingly heavier
Depending on energy-saving and emission-reduction and the application that taps a new source of energy, new-energy automobile also has become various countries' research as the important branch that the energy makes the transition
Hot spot, it is battery most with prospects at present that power lithium iron phosphate battery dynamic response performance is good, has extended cycle life, but
In order to meet high-power applications demand, it is extensive series-parallel after there is still a need for the battery management systems of configuration high efficient and reliable, wherein
Balance route is the most key part of battery management system, is directly related to the service life and security reliability of battery pack,
The passive balancing control circuit of existing battery management system, there is also following shortcomings:
For example, patent name is a kind of passive equilibrium of vehicle mounted battery management system application No. is 201620561118.6
The utility model patent of control circuit:
It uses double concatenated modes of MOS to switch, and is vented battery cell after preventing single MOS single point failure, increases simultaneously
Balanced open state detection is added to ensure to need opening when equilibrium to be monitored, mention to balanced executive condition without closing when equilibrium
The reliability of high equalizing circuit.The utility model solves the problems, such as that battery pack system monomer consistency is poor, improves system
Active volume extends the service life of battery pack, improves the cruising ability of vehicle.
But the passive balancing control circuit of existing battery management system has the following deficiencies:
(1) negative in each one switch of battery unit both ends parallel connection and one in passive balanced battery management system
Resistance is carried, this circuit conditioning can choose any respective unit cells and discharge, and this method is suitable for filling for battery pack
Electric process, the battery discharge high to voltage are only applicable to battery charging occasion, and this equilibrium has too many unnecessary energy
Loss, some circuits consider that power problems, electric current when balanced discharge down to 100mA, so during the charging process
Weighing apparatus is time-consuming to be up to a few houres, inefficiency；
(2) although the method balancing speed of existing equilibrium is fast, energy loss is few, and synchronization can only have two batteries ginseng
Among balanced with arriving, switch control is complicated, compared with transformer type active equalization, the energy transfer efficiency of inductance type active equalization
It is too low.
Summary of the invention
In order to overcome the shortcomings of prior art, the utility model provides a kind of passive balanced control of battery management system
Circuit processed can effectively solve the problem of background technique proposes.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of passive balancing control circuit of battery management system, including it is the first two-way flyback transformer, second two-way
Flyback transformer and the two-way flyback transformer of third, the first two-way flyback transformer, the second two-way inverse-excitation type become
The input positive terminal of depressor and the two-way flyback transformer of third is connected in series, the first two-way flyback transformer it is defeated
Enter end and be connected with the first enhanced MOSFET, is serially connected with the first afterflow between the source electrode and drain electrode of the first enhanced MOSFET
The output end of diode, the first two-way flyback transformer is connected with the second enhanced MOSFET, and described second is enhanced
The second freewheeling diode is serially connected between the source electrode and drain electrode of MOSFET, the output end of the first two-way flyback transformer is also
And it is connected to the first battery pack, the positive terminal of first battery pack is connected with the first two-way flyback transformer input positive terminal
It connects, the positive terminal of first battery pack is also serially connected with the first MOS switch pipe, and the other end of first MOS switch pipe passes through
First resistor is connected with the negative pole end of the first battery pack.
Further, the input terminal of the described second two-way flyback transformer is connected with the enhanced MOSFET of third, described
Third freewheeling diode, the source of the enhanced MOSFET of third are serially connected between the source electrode and drain electrode of the enhanced MOSFET of third
Pole is connected with the source electrode of the first enhanced MOSFET, and the output end of the second two-way flyback transformer is connected with the 4th increasing
Strong type MOSFET, is serially connected with the 4th freewheeling diode between the source electrode and drain electrode of the 4th enhanced MOSFET, and described second
The output cathode end of two-way flyback transformer also and is connected to the second battery pack, the positive terminal of second battery pack and the first electricity
The negative pole end of pond group is connected, and second battery electrode end is connected with the source electrode of the 4th enhanced MOSFET.
Further, the both ends of second battery pack also and are connected to the second MOS switch pipe and second resistance, and described second
It is series connection between MOS switch pipe and second resistance.
Further, the input terminal of the two-way flyback transformer of the third is connected with the 5th enhanced MOSFET, described
The 5th freewheeling diode, the source of the 5th enhanced MOSFET are serially connected between the source electrode and drain electrode of 5th enhanced MOSFET
Pole is connected with the source electrode of the enhanced MOSFET of third, and the output end of the two-way flyback transformer of third is connected with the 6th increasing
Strong type MOSFET is serially connected with the 6th freewheeling diode, the third between the source electrode and drain electrode of the 6th enhanced MOSFET
The output cathode end of two-way flyback transformer also and is connected to third battery pack, the positive terminal of the third battery pack and the second electricity
The negative pole end of pond group is connected, and third battery electrode end is connected with the source electrode of the 6th enhanced MOSFET.
Further, the both ends of the third battery pack also and are connected to third MOS switch pipe and 3rd resistor, the third
It is series connection between MOS switch pipe and 3rd resistor.
Compared with prior art, the utility model has the beneficial effects that
(1) the passive balancing control circuit of the battery management system of the utility model can not only realize energy from input
Hold the forward transfer of output end, moreover it is possible to realize output end to input terminal reverse transition, annexed damage it is balanced with it is lossless
The function of weighing apparatus；
(2) the passive balancing control circuit of the battery management system of the utility model, using hybrid equalizer circuit topology
Structure farthest reduces loss of the single equilibrium to metal-oxide-semiconductor and balanced component, has further reduced the difference between battery
It is different.
Detailed description of the invention
Fig. 1 is the integrated circuit schematic diagram of the utility model；
Fig. 2 is the two-way flyback transformer schematic diagram of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As depicted in figs. 1 and 2, the utility model provides a kind of passive balancing control circuit of battery management system, packet
Include the first two-way flyback transformer T1, the second two-way flyback transformer T2 and third two-way flyback transformer T3, first
The input positive terminal of two-way flyback transformer T1, the second two-way flyback transformer T2 and the two-way flyback transformer T3 of third
It is connected in series, the input terminal of the first two-way flyback transformer T1 is connected with the first enhanced MOSFETQ11, and first is enhanced
The first sustained diode 11, the output of the first two-way flyback transformer T1 are serially connected between the source electrode and drain electrode of MOSFETQ11
End is connected with the second enhanced MOSFETQ12, is serially connected with the second afterflow between the source electrode and drain electrode of the second enhanced MOSFETQ12
Diode D12, the output end of the first two-way flyback transformer T1 also and are connected to the first battery pack B1, and the first battery pack B1 is just
Extremely it is connected with the first two-way flyback transformer T1 input positive terminal, the positive terminal of the first battery pack B1 is also serially connected with first
The other end of MOS switch pipe K1, the first MOS switch pipe K1 are connected by first resistor R1 with the negative pole end of the first battery pack B1
It connects.
The input terminal of second two-way flyback transformer T2 is connected with the enhanced MOSFETQ21 of third, and third is enhanced
Be serially connected with third sustained diode 21 between the source electrode and drain electrode of MOSFETQ21, the source electrode of the enhanced MOSFETQ21 of third with
The source electrode of first enhanced MOSFETQ11 is connected, and the output end of the second two-way flyback transformer T2 is connected with the 4th enhancing
Type MOSFETQ22, is serially connected with the 4th sustained diode 22 between the source electrode and drain electrode of the 4th enhanced MOSFETQ22, and second pair
Also and the second battery pack B2 is connected to the output cathode end of flyback transformer T2, the positive terminal of the second battery pack B2 and the first electricity
The negative pole end of pond group B1 is connected, and the second battery pack B2 negative pole end is connected with the source electrode of the 4th enhanced MOSFETQ22, and second
The both ends of battery pack B2 also and are connected to the second MOS switch pipe K2 and second resistance R2, the second MOS switch pipe K2 and second resistance R2
Between for be connected in series.
The input terminal of the two-way flyback transformer T3 of third is connected with the 5th enhanced MOSFETQ31, and the 5th is enhanced
Be serially connected with the 5th sustained diode 31 between the source electrode and drain electrode of MOSFETQ31, the source electrode of the 5th enhanced MOSFETQ31 with
The source electrode of the enhanced MOSFETQ21 of third is connected, and the output end of the two-way flyback transformer T3 of third is connected with the 6th enhancing
Type MOSFETQ32, the 6th sustained diode 32 is serially connected between the source electrode and drain electrode of the 6th enhanced MOSFETQ32, and third is double
Also and third battery pack B3 is connected to the output cathode end of flyback transformer T3, the positive terminal of third battery pack B3 and the second electricity
The negative pole end of pond group B2 is connected, and third battery pack B3 negative pole end is connected with the source electrode of the 6th enhanced MOSFETQ32, third
The both ends of battery pack B3 also and are connected to third MOS switch pipe K3 and 3rd resistor R3, third MOS switch pipe K3 and 3rd resistor R3
Between for be connected in series.
In the present embodiment, passive balancing control circuit is to pass through electricity using two-way flyback transformer as energy carrier
Energy can be made to form two-way transfer between single battery and battery pack the conversion between magnetic energy, to reach putting down for energy
Weighing apparatus, it is assumed that a certain section single battery energy is higher, then opens corresponding metal-oxide-semiconductor in its armature winding, extra electric energy is with magnetic energy
Form is stored in transformer inductance, and secondary windings induced electromotive force is ended due to diode, then, closes armature winding
Middle metal-oxide-semiconductor, secondary windings induced electromotive force is reversed, and diode current flow, magnetic energy is converted to electric energy and is discharged into battery pack.
In the present embodiment, using hybrid equalizer circuit topological structure, transformer is connected simultaneously at the both ends of series-connected cell
Equilibrium is carried out with resistance for dissipation, it is enhanced using the first enhanced MOSFETQ11, the second enhanced MOSFETQ12, third
MOSFETQ21, the 4th enhanced MOSFETQ22, the 5th enhanced MOSFETQ31 and the 6th enhanced MOSFETQ32 are mainly used
Control equilibrium, the first MOS switch pipe K1, the second MOS switch pipe K2 and third MOS switch pipe K3 be mainly used to control dissipate it is equal
Weigh the switch opened and closed.
In the present embodiment, the working principle of passive balancing control circuit: when detect between battery when differing greatly, open
High-efficient, fireballing flyback transformer active equalization is opened, when detecting the smaller inch of the difference between battery, is opened simple
, effective conductive discharge formula it is balanced, further reduce the difference between battery.When detecting the difference very little between battery, stop
Only any equilibrium.Two ways complements each other, and farthest reduces single equilibrium to the damage of metal-oxide-semiconductor and balanced component
Consumption.
In the present embodiment, passive balance policy is using battery minimum in battery pack as the balanced datum of mode decision scheme, mainly
Be since the balanced way can only carry out the discharge treatment of battery, due to the presence of this defect, we only in the charging of battery and
The equalization methods are used under standing mode, we only open active equalization mode, i.e. different mode under the discharge mode of battery
Under take different equilibriums.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
Claims (5)
1. a kind of passive balancing control circuit of battery management system, including the first two-way flyback transformer (T1), second pair
To flyback transformer (T2) and the two-way flyback transformer of third (T3), it is characterised in that: the first two-way inverse-excitation type becomes
The input positive terminal of depressor (T1), the second two-way flyback transformer (T2) and the two-way flyback transformer of third (T3) is connected
Connection, the input terminal of the first two-way flyback transformer (T1) are connected with the first enhanced MOSFET (Q11), and described first
It is serially connected with the first freewheeling diode (D11) between the source electrode and drain electrode of enhanced MOSFET (Q11), the first two-way inverse-excitation type
The output end of transformer (T1) is connected with the second enhanced MOSFET (Q12), the source electrode of the second enhanced MOSFET (Q12)
It is serially connected between drain electrode the second freewheeling diode (D12), the output end of the first two-way flyback transformer (T1) is also simultaneously
It is connected to the first battery pack (B1), the positive terminal of first battery pack (B1) and the first two-way flyback transformer (T1) input are just
Extremely it is connected, the positive terminal of first battery pack (B1) is also serially connected with the first MOS switch pipe (K1), and the first MOS is opened
The other end for closing pipe (K1) is connected by first resistor (R1) with the negative pole end of the first battery pack (B1).
2. a kind of passive balancing control circuit of battery management system according to claim 1, it is characterised in that: described
The input terminal of two two-way flyback transformers (T2) is connected with the enhanced MOSFET of third (Q21), and the third is enhanced
It is serially connected between the source electrode and drain electrode of MOSFET (Q21) third freewheeling diode (D21), the enhanced MOSFET of third
(Q21) source electrode is connected with the source electrode of the first enhanced MOSFET (Q11), the second two-way flyback transformer (T2)
Output end is connected with the 4th enhanced MOSFET (Q22), goes here and there between the source electrode and drain electrode of the 4th enhanced MOSFET (Q22)
It is connected to the 4th freewheeling diode (D22), the output cathode end of the second two-way flyback transformer (T2) also and is connected to second
The positive terminal of battery pack (B2), second battery pack (B2) is connected with the negative pole end of the first battery pack (B1), and described second
Battery pack (B2) negative pole end is connected with the source electrode of the 4th enhanced MOSFET (Q22).
3. a kind of passive balancing control circuit of battery management system according to claim 2, it is characterised in that: described
The both ends of two battery packs (B2) also and are connected to the second MOS switch pipe (K2) and second resistance (R2), second MOS switch pipe
It (K2) is series connection between second resistance (R2).
4. a kind of passive balancing control circuit of battery management system according to claim 1, it is characterised in that: described
The input terminal of three two-way flyback transformers (T3) is connected with the 5th enhanced MOSFET (Q31), and the described 5th is enhanced
The 5th freewheeling diode (D31), the 5th enhanced MOSFET are serially connected between the source electrode and drain electrode of MOSFET (Q31)
(Q31) source electrode is connected with the source electrode of the enhanced MOSFET of third (Q21), the two-way flyback transformer of third (T3)
Output end is connected with the 6th enhanced MOSFET (Q32), goes here and there between the source electrode and drain electrode of the 6th enhanced MOSFET (Q32)
It is connected to the 6th freewheeling diode (D32), the output cathode end of the two-way flyback transformer of third (T3) also and is connected to third
The positive terminal of battery pack (B3), the third battery pack (B3) is connected with the negative pole end of the second battery pack (B2), the third
Battery pack (B3) negative pole end is connected with the source electrode of the 6th enhanced MOSFET (Q32).
5. a kind of passive balancing control circuit of battery management system according to claim 4, it is characterised in that: described
The both ends of three battery packs (B3) also and are connected to third MOS switch pipe (K3) and 3rd resistor (R3), the third MOS switch pipe
It (K3) is series connection between 3rd resistor (R3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821376878.5U CN208460913U (en) | 2018-08-25 | 2018-08-25 | A kind of passive balancing control circuit of battery management system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821376878.5U CN208460913U (en) | 2018-08-25 | 2018-08-25 | A kind of passive balancing control circuit of battery management system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110126675A (en) * | 2019-05-10 | 2019-08-16 | 杭州电子科技大学 | A kind of passive mating type mixed equilibrium circuit of master applied to power battery |
| CN110203106A (en) * | 2019-05-10 | 2019-09-06 | 杭州电子科技大学 | A kind of active mixed equilibrium circuit applied to power battery |
| CN110293881A (en) * | 2019-07-15 | 2019-10-01 | 西南交通大学 | A kind of lithium battery bidirectional equalization system and method based on flyback transformer |
| CN111146835A (en) * | 2019-12-27 | 2020-05-12 | 江苏天鹏电源有限公司 | Battery management system and power battery |
| CN112039426A (en) * | 2020-08-25 | 2020-12-04 | 中国空间技术研究院 | Low-loss solar cell shunting adjusting module |
-
2018
- 2018-08-25 CN CN201821376878.5U patent/CN208460913U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110126675A (en) * | 2019-05-10 | 2019-08-16 | 杭州电子科技大学 | A kind of passive mating type mixed equilibrium circuit of master applied to power battery |
| CN110203106A (en) * | 2019-05-10 | 2019-09-06 | 杭州电子科技大学 | A kind of active mixed equilibrium circuit applied to power battery |
| CN110293881A (en) * | 2019-07-15 | 2019-10-01 | 西南交通大学 | A kind of lithium battery bidirectional equalization system and method based on flyback transformer |
| CN111146835A (en) * | 2019-12-27 | 2020-05-12 | 江苏天鹏电源有限公司 | Battery management system and power battery |
| CN112039426A (en) * | 2020-08-25 | 2020-12-04 | 中国空间技术研究院 | Low-loss solar cell shunting adjusting module |
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